package cn.edu.xmu.wnw.dao.impl;

import java.util.List;

import org.hibernate.LockMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import cn.edu.xmu.wnw.dao.WikiDAO;
import cn.edu.xmu.wnw.pojo.Wiki;

/**
 * A data access object (DAO) providing persistence and search support for Wiki
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see cn.edu.xmu.wnw.pojo.Wiki
 * @author MyEclipse Persistence Tools
 */

public class WikiDAOImpl extends HibernateDaoSupport implements WikiDAO
{
	private static final Logger log = LoggerFactory
			.getLogger(WikiDAOImpl.class);
	// property constants
	public static final String TITLE = "title";
	public static final String CONTENT = "content";
	public static final String HIT = "hit";
	public static final String STATE = "state";

	public void initDao()
	{
		// do nothing
	}

	public void save(Wiki transientInstance)
	{
		log.debug("saving Wiki instance");
		try
		{
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		}
		catch (RuntimeException re)
		{
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Wiki persistentInstance)
	{
		log.debug("deleting Wiki instance");
		try
		{
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		}
		catch (RuntimeException re)
		{
			log.error("delete failed", re);
			throw re;
		}
	}

	public Wiki findById(java.lang.Integer id)
	{
		log.debug("getting Wiki instance with id: " + id);
		try
		{
			Wiki instance = (Wiki) getHibernateTemplate().get(
					"cn.edu.xmu.wnw.pojo.Wiki", id);
			return instance;
		}
		catch (RuntimeException re)
		{
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Wiki instance)
	{
		log.debug("finding Wiki instance by example");
		try
		{
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		}
		catch (RuntimeException re)
		{
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value)
	{
		log.debug("finding Wiki instance with property: " + propertyName
				+ ", value: " + value);
		try
		{
			String queryString = "from Wiki as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		}
		catch (RuntimeException re)
		{
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByTitle(Object title)
	{
		return findByProperty(TITLE, title);
	}

	public List findByContent(Object content)
	{
		return findByProperty(CONTENT, content);
	}

	public List findByHit(Object hit)
	{
		return findByProperty(HIT, hit);
	}

	public List findByState(Object state)
	{
		return findByProperty(STATE, state);
	}

	public List findAll()
	{
		log.debug("finding all Wiki instances");
		try
		{
			String queryString = "from Wiki";
			return getHibernateTemplate().find(queryString);
		}
		catch (RuntimeException re)
		{
			log.error("find all failed", re);
			throw re;
		}
	}

	public Wiki merge(Wiki detachedInstance)
	{
		log.debug("merging Wiki instance");
		try
		{
			Wiki result = (Wiki) getHibernateTemplate().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		}
		catch (RuntimeException re)
		{
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Wiki instance)
	{
		log.debug("attaching dirty Wiki instance");
		try
		{
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Wiki instance)
	{
		log.debug("attaching clean Wiki instance");
		try
		{
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public WikiDAOImpl getFromApplicationContext(ApplicationContext ctx)
	{
		return (WikiDAOImpl) ctx.getBean("WikiDAO");
	}
}